babel.config.js

module.exports = {
  presets: [
    ['@babel/preset-env', {
      targets: {
        chrome: '64',
        firefox: '58',
        ie: '11',
        safari: '11'
      },
      modules: false,
      debug: false,
      useBuiltIns: 'usage',
      corejs: 3,
    }]
  ],
  plugins: [
    ['transform-inline-environment-variables']
  ],
  env: {
    // Environment for transpiling files to be compatible with UMD.
    commonjs: {
      plugins: [
        ['@babel/plugin-transform-runtime', {
          corejs: false,
          helpers: false,
          regenerator: false,
          useESModules: false,
        }],
        ['@babel/plugin-transform-modules-commonjs', { loose: true }]
      ]
    },
    // Environment for transpiling files to be compatible with CommonJS.
    commonjs_dist: {
      plugins: [
        ['@babel/plugin-transform-modules-commonjs', { loose: true }],
      ],
    },
    // Environment for transpiling files to be compatible with ES Modules.
    es: {
      plugins: [],
    },
  },
};